If it is correctly designed, then it should be no worse than any other motor driven kit intended to live outdoors- and to be honest if it leaks 30mA to earth more from one phase than the others then it has probably got wetter inside than it should. There are mining installations with what are in effect 3kV extension leads with connectors running in mud without issues. Enclosures and louvred vents can be organised to keep things cool and still be dry in the mud and rain, though I agree there are plenty of examples in practice, especially agricultural practice, that are not as good as they could be, and a higher leakage threshold may be a work around for the first start after a long idle period until the things warm up a bit.
The bigger source of grief in terms of earth leakage will be if there is a VFD in the box, and that is probably also the biggest risk for premature failure if the PCB with the electronics suffers from the green copper plague.
If it is correctly designed, then it should be no worse than any other motor driven kit intended to live outdoors- and to be honest if it leaks 30mA to earth more from one phase than the others then it has probably got wetter inside than it should. There are mining installations with what are in effect 3kV extension leads with connectors running in mud without issues. Enclosures and louvred vents can be organised to keep things cool and still be dry in the mud and rain, though I agree there are plenty of examples in practice, especially agricultural practice, that are not as good as they could be, and a higher leakage threshold may be a work around for the first start after a long idle period until the things warm up a bit.
The bigger source of grief in terms of earth leakage will be if there is a VFD in the box, and that is probably also the biggest risk for premature failure if the PCB with the electronics suffers from the green copper plague.
